linux-kernel - [PATCH 03/11] intel-gtt: Read 64bit for gmar_bus

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 22 May 2012 23:34:29 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>,
	David Airlie <airlied@...ux.ie>
Subject: [PATCH 03/11] intel-gtt: Read 64bit for gmar_bus_addr

That bar could be 64bit pref mem.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: David Airlie <airlied@...ux.ie>
---
 drivers/char/agp/intel-gtt.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 7f025fb..77e150e 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -770,16 +770,22 @@ static void i830_write_entry(dma_addr_t addr, unsigned int entry,
 static bool intel_enable_gtt(void)
 {
 	u32 gma_addr;
+	u32 addr_hi = 0;
 	u8 __iomem *reg;
+	int pos;
 
 	if (INTEL_GTT_GEN <= 2)
-		pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
-				      &gma_addr);
+		pos = I810_GMADDR;
 	else
-		pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
-				      &gma_addr);
+		pos = I915_GMADDR;
+
+	pci_read_config_dword(intel_private.pcidev, pos, &gma_addr);
+
+	if (gma_addr & PCI_BASE_ADDRESS_MEM_TYPE_64)
+		pci_read_config_dword(intel_private.pcidev, pos + 4, &addr_hi);
 
 	intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
+	intel_private.gma_bus_addr |= (u64)addr_hi << 32;
 
 	if (INTEL_GTT_GEN >= 6)
 	    return true;
-- 
1.7.7

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/